Remark:
(Note: the red wire is positive and the Black wire is negative, both can attach to the led. On the backside,inside of the circle,it is positive for power supply;outside of the circel,it is negtive for power supply.)
Safety information:
Supply voltage of this product is DC6V
Never connect two wires directly in case of short circuit
Lead wire should be connected correctly according to colors that connecting diagram
 

(LED Bulb)Specifications:

Output Power: 30W
Light Color:Cool White Light,Nutural White,Warm White
Color temperature:6000-6500K,4000-4500K,3000-3500k
Base : 16mm or 20mm Copper Board
Size (mm) :7.0 x 7.0
Light output :Up to 4200 lm
Application: Great for flashlight DIY.
Material: Copper plate

(LED Driver)Specification:

Input Voltage:DC6V-15V( can use 2~3pcs lithium battery)
Current: 4A
Dimmable function: Yes
5 Mode: Low (10%), mid (50%), high (100%), strobe (100%), SOS (100%)
1 Mode:high (100%),(only ON/OFF,more easy)
Size:26mm*14.5mm
TC: 75 degree (MAX)
TA: 50 degree (MAX)
Size:(D)26*(H)12MM
Connection:
RED/Led+:LED Output Positive
White/Led-:LED Output Negative
Operating Temperature: -20~80 degree
Storage Temperature: -20~80 degree
Function: Open circuit, Short circuit and Over loading 

Used for LED:  Like 40W to 42W LED series etc
Application: Great for flashlight DIY.
Material: electronic components

Package Included:

1x  30W LED Emitter(16MM/20MM pcb,optional)
1x  26MM Flashlight Driver